Bug: Missing error handling in calculator.js example

[paul-fracture]

The method in lacks proper error handling for division by zero.

Steps to reproduce

1. Create a Calculator instance
2. Call calculator.divide(10, 0)

Expected behavior

The function should handle division by zero by throwing a clear error message or returning an appropriate value.

Current behavior

The function returns Infinity without any error handling.

Fix suggestion

Please add appropriate error checking to prevent division by zero operations.